RESOLVED DUPLICATE of bug 283870299120
Optional chaining breaks syntax highlighting in string interpolation 
https://bugs.webkit.org/show_bug.cgi?id=299120
Summary Optional chaining breaks syntax highlighting in string interpolation
roman.deev06
Reported 2025-09-18 13:20:14 PDT
Created attachment 476794 [details] Example of broken syntax highlighting Minimal example: ``` <!DOCTYPE html> <html lang="en"> <script> const x = undefined const foo = x?.value console.log(`${1234}`) console.log("bye") </script> <body> </body> </html> ``` In the attachment, you can see that the code > `) > console.log("bye") it starts to be highlighted as a string. If you remove the `?` , the backlight works correctly
Attachments
Example of broken syntax highlighting (52.57 KB, image/png)
2025-09-18 13:20 PDT, roman.deev06 		no flags
Details
Test Case (Same as Comment 0) (175 bytes, text/html)
2025-09-18 15:13 PDT, Ahmad Saleem 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Ahmad Saleem
Comment 1 2025-09-18 15:13:12 PDT
Created attachment 476795 [details] Test Case (Same as Comment 0) It reproduces on WebKit ToT (Minibrowser) [300179@main].
Razvan Caliman
Comment 2 2025-09-22 07:25:53 PDT
Thank you for filing the issue! This will be fixed by the patch for https://bugs.webkit.org/show_bug.cgi?id=283870 *** This bug has been marked as a duplicate of bug 283870 ***
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